<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="vue/vue.js" charset="utf-8"></script>
    <script src="vue/vue-resource.js"> </script>

    <style>
        .gray{
            background-color: #ccc;
        }
    </style>

</head>
<body>

<div id="app">
    <input type="text" v-model="t1" @keyup="get($event)" @keydown.down="changDown" @keydown.up.prevent="changUp" >
    <ul>
        <li v-for="(value,index) in myData"  :class="{gray:index==now}" > {{value}}</li>
    </ul>

    <p v-show="myData.length==0">暂无数据...</p>
</div>

<script>
    new Vue({
        el:'#app',
        data(){
            return{
                myData:[],
                now:-1,
                t1:''
            }
        },
        methods:{
            get(ev){
                if(ev.keyCode==13){
                    window.open('https://www.baidu.com/s?wd='+this.t1);
                    this.t1=""
                }
                this.$http.jsonp('https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su',{
                    params:{
                        wd:this.t1
                    },
                    jsonp:'cb'
                }).then(function (res) {
                    this.myData=res.data.s;
                },function () {
                })
            },
            changDown(){
                this.now++
                if(this.now==this.myData.length){
                    this.now=0
                }
            },
            changUp(){
                this.now--
                if(this.now == -1){
                    this.now=this.myData.length-1
                }
            }
        }
    })
</script>

</body>
</html>